Apple II clock using interrupts from physical pendulum clock
A clock app for my Apple ][ clone in 6502 assembly, using interrupts generated by an inductive proximity sensor and a physical pendulum clock. I wanted to polish the code a bit more before sharing (I especially dislike the self modifying code part), but the computer seems to have developed a hardware problem lately and it keeps crashing (bad RAM chip most likely), so I am sharing as is.
Apple II clock using interrupts from physical pendulum clock launched on January 28, 2024 with 157 votes, #292 of 4,438 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 2 years on.
In plain words
This is a clock application written in 6502 assembly for Apple II clone computers. It uses interrupts from an inductive proximity sensor connected to a physical pendulum clock to keep time. The code includes self-modifying sections the developer wishes to refactor. It is shared as-is due to hardware issues on the developer's machine. The project is available on GitHub for retro computing enthusiasts and assembly language programmers.
written from the facts on this page · September 2026
From the sources
Apple 2 full screen clock driven by the pendulum of my wall clock - apple2_pendulum_clock/README.md at main · wkjagt/apple2_pendulum_clock
Does a similar job
all alternatives →- TATinyClock – a tiny true 5-arch universal Mac OS X single-binary GUI app2022 · tycho.sytes.net · ▲192
1. Single universal binary, that can be natively executed on every hardware platform Mac OS X was made for (32/64 bit, PowerPC/x86/AppleSilicon). 2. Minimalistic gadget-style design. If launched as a tool, there is no menubar, no dock icon, no nothing, just the clock window. 3. Support for hidpi and dark mode for environments, that have them. 4. Window title bar for moving the window with a mouse, and a handle to resize it (latter for OS versions, that have it). 5. Can be easily ported to GNUStep and thus other OSes (sources under GPLv3). 6. Simple Makefile build system.
Arduino 6502 Controller2022 · github.com · ▲52The 6502ctl project is an Arduino controller for the 6502 CPU. The controller controls all 6502 pins, including the clock signal and interrupts, and simulates an address and data bus with attached memory and an output peripheral. The controller includes a clock-cycle debugger with disassembler. An assembler is also included with the project.
Clocksimulator.com – A minimalist, distraction-free analog clockFeb 2026 · clocksimulator.com · ▲131Hello all! Build clean, minimalistic analog clock webpage to Cloudflare Pages. This is for (maybe): - kids to learn - for second monitor - old tabled on shelf - .. Themes and screen wake lock buttons with auto-hide. Goal is to keep it as clean as possible. This possible makes no sense, but for a domain of $10/y this is cheap site for me to keep and see how it lives on.
More dev tools this month
the category →
open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.
Dev tools · 27d ago · github.com
Contribute to reladraw/reladraw development by creating an account on GitHub.
Dev tools · 25d ago · github.com
OpenBot▲362Grok Bot alternative: free, local, open-source, multiplayer
Dev tools · 22d ago · openbot.run
Talanoa▲340Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…
Dev tools · 20d ago · talanoa.email
CoreSpeed▲332One MCP for everything your agents need: apps, memory, tools
Dev tools · 27d ago · corespeed.io
Source: Show HN post ↗
Launched alongside, January 2024
the whole month →
Amie▲1,334Turn meeting notes into automated workflows. Handle meetings, summaries, todos and emails (soon) with your AI personal assistant.
Work · 2024 · amie.so
- IM
Sit in Shade - Discover the optimal seat to stay in the shade during your journey. Sit In Shade provides real-time sun exposure data and route visualization.
Life & fun · 2024 · sitinshade.com
